John Joseph Dullaghan III (November 27, 1930[1] – January 18, 2009) was an American film, stage and television actor.
He was known for playing the role of Dr. Wilker in the American science fiction television series Battlestar Galactica.
[3] He guest-starred in television programs including Gunsmoke, The Rockford Files, Barnaby Jones, B. J. and the Bear (9 episodes), Night Court, The King of Queens and Cannon, and played the recurring role of Ray Brewer in the sitcom television series Barney Miller.
[3] He also appeared in films such as Garden of the Dead, Kalifornia, The Thing with Two Heads, Apollo 13 and Sweet Sweetback's Baadasssss Song.
[4] Dullaghan died on January 18, 2009 of lung cancer in Los Angeles, California, at the age of 78.